GRADE

ROUND BAR   CHEMICAL COMPOSITION

MECHANICAL   PROPERTY(MPA)

Standard

C %

Mn %

Si %

P %

S %

Cr %

Ni %

Cu %

Y/S

T/S

SS400

_

_

_

≤0.050

≤0.050

≤0.20

_

_

≥245

400~510

S45C

0.42~0.48

0.60~0.90

0.15~0.35

≤0.03

≤0.03

≤0.20

≤0.20

≤0.30

_

_

JIS   G4051-2005

S20C

0.18~0.23

0.30~0.60

0.15~0.35

≤0.03

≤0.035

≤0.20

≤0.20

≤0.30

_

_

ASTM A36

≤0.22

0.50~0.90

≤0.40

≤0.040

≤0.050

≤0.20

≤0.20

≤0.30

≥250

400~500

ASTM   A36/A36M-03a

ASTM A105

≤0.35

0.6-1.05

≤0.35

≤0.050

≤0.040

≤0.20

≤0.20

≤0.30

≥310

485~620

ASTM   A105/A105M

SAE1020

0.18~0.23

0.30~0.60

_

≤0.040

≤0.050

≤0.20

≤0.20

≤0.30

_

_

S235JR

0.15~0.20

≤1.4

_

≤0.035

≤0.035

≤0.20

_

_

≥235

400~510

EN10025

S275JR

≤0.22

≤1.4

_

≤0.035

≤0.035

≤0.20

_

_

≥275

490~610

ST37-2

0.17~0.20

≤1.4

_

≤0.045

≤0.045

≤0.20

_

_

≥235

400~510

DIN17100